diff --git a/source/Generating/StructGen.cpp b/source/Generating/StructGen.cpp
index 2180261a..bd8f5d58 100644
--- a/source/Generating/StructGen.cpp
+++ b/source/Generating/StructGen.cpp
@@ -274,6 +274,7 @@ int cStructGenTrees::GetNumTrees(
 			case biExtremeHillsEdge: Add =   5; break;
 			case biJungle:           Add = 120; break;
 			case biJungleHills:      Add =  90; break;
+			default:                 Add =   0; break;
 		}
 		NumTrees += Add;
 	}